JPH0135905B2 - - Google Patents
Info
- Publication number
- JPH0135905B2 JPH0135905B2 JP55033530A JP3353080A JPH0135905B2 JP H0135905 B2 JPH0135905 B2 JP H0135905B2 JP 55033530 A JP55033530 A JP 55033530A JP 3353080 A JP3353080 A JP 3353080A JP H0135905 B2 JPH0135905 B2 JP H0135905B2
- Authority
- JP
- Japan
- Prior art keywords
- alloy
- commutator
- present
- wear
- brushes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000000463 material Substances 0.000 claims description 22
- 229910052709 silver Inorganic materials 0.000 claims description 9
- 229910001316 Ag alloy Inorganic materials 0.000 claims description 5
- 229910001252 Pd alloy Inorganic materials 0.000 claims description 4
- 229910052793 cadmium Inorganic materials 0.000 claims description 3
- 229910052748 manganese Inorganic materials 0.000 claims description 3
- 229910052718 tin Inorganic materials 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 description 8
- 239000000956 alloy Substances 0.000 description 8
- 229910017944 Ag—Cu Inorganic materials 0.000 description 6
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005486 sulfidation Methods 0.000 description 1
Landscapes
- Motor Or Generator Current Collectors (AREA)
Description
本発明は、マイクロモータ等に用いられるAg
−Pd合金刷子用整流子材料改良に関するもので
ある。
一般に、マイクロモータ等に用いられる整流子
用の材料としては、Ag又はAg−Cu合金等が用い
られていた。更には、初期の接触抵抗を安定させ
る等の目的でAg又はAg−Cu合金の表面にAu・
Ag合金層等を設け、又それをりん青銅等の台材
にそれを張り合わせた所謂クラツド材もその用途
に依り用いられていた。このクラツド材の場合、
その表面に設けられたAu・Ag等の合金層は、整
流子片としてマイクロモータ等に組み込み稼動さ
せる迄の腐食等に対する接触面の保護及び、初期
に於ける接触抵抗の安定等の為に用いられるもの
であり、中間層として設けられたAg又はAg−Cu
合金が本来の接触面として用いられるものであ
る。
この様にして従来用いられていたAg又はAg−
Cu合金等は、電気伝導度等を考慮して採用され
ていたものであるが、その反面Ag又はAg−Cu合
金はその硬度が低い為に整流子片として用いた場
合、その摩耗量が多くその結果長期に渡つて移動
した場合の寿命についての信頼性に欠けるという
欠点があつた。
本発明はこの欠点に鑑みて成されたものであ
り、従来用いられていたAg又はAg−Cu合金の持
つ優れた電子伝導度の特性は略保持し、且つ硬度
の高い即ち耐摩耗性に優れたAg−Pd合金刷子用
整流子材料を提供せんとするものである。
本発明はSn、Cd及びMnの内の少なくとも１種
の総量で0.05〜１重量％、Feを0.05〜0.5重量％及
び残部AgからなるAg合金が内部酸化されたAg
−Pd合金刷子用整流子材料である。
前記のSn、Cd及びMnは、内部酸化処理を施し
た際に微細な酸化物となつてAg中に分散し、Ag
の軟化温度を高め更には機械的強度を向上させる
役目を果たすものである。その含有量を0.05〜１
重量％（以下「ｗ／ｏ」とする。）と限定したの
は、0.05w／ｏ未満ではAg中に分散する割合が少
なくなり、その結果機械的強度の向上があまり機
械出来ず、又1w／ｏ以上含有させてもそれ以上
あまり機械的強度の向上は望めずむしろ素材を脆
化させてしまうという逆効果を生じさせてしまう
からである。
次にFeは、内部酸化処理中にAgの結晶粒の粗
大化を抑制し、素材が脆化するのを防止する為の
ものである。その含有量を0.05〜0.5w／ｏと限定
したのは0.05w／ｏ未満では素材の脆化を防止す
る効果が低く、又0.5w／ｏを越えるとAg中に均
一に分散することが困難となり、偏析等の欠陥の
発生原因となつてしまうからである。
次に本発明の効果を明瞭ならしめるためにその
具体的な実施例と従来例について説明する。
実施例 １
Agを高周波溶解炉にて溶解しこれにSnを
0.4w／ｏ及びFeを0.15w／ｏ添加してAg合金と
成した後鋳造し鋳塊を得た。この鋳塊を伸線加工
し所望する寸法の素材とした。然る後酸素雰囲気
中700℃にて１０時間加熱し内部酸化処理を施し
た。この素材を更に圧延加工し所定の厚さのテー
プ材と成した。
以下同様にして別表左欄に示す材料を用いて整
流子を製造した。
以上実施例１〜10に示した材料と比較例及び従
来整流子として用いられていたAg及びAg−Cu合
金（Ag−7.5w／oCu）について電気伝導度及び
硬度、更には整流子片として、2100回転／分にて
500時間Ag−50w／oPdと摺動させた場合の摩耗
量（摩耗深さ）について測定した。その測定結果
を表に示す。
The present invention is based on Ag used in micro motors, etc.
-Related to improvements in commutator materials for Pd alloy brushes. Generally, Ag or an Ag-Cu alloy has been used as a material for commutators used in micro motors and the like. Furthermore, Au/Au is added to the surface of Ag or Ag-Cu alloy for the purpose of stabilizing the initial contact resistance.
So-called clad materials, in which an Ag alloy layer or the like is provided and laminated onto a base material such as phosphor bronze, have also been used depending on the purpose. In the case of this clad material,
The alloy layer of Au, Ag, etc. provided on the surface is used as a commutator piece to protect the contact surface from corrosion etc. until it is installed in a micro motor etc. and is operated, and to stabilize the contact resistance in the initial stage. Ag or Ag-Cu provided as an intermediate layer.
An alloy is used as the original contact surface. In this way, the conventionally used Ag or Ag-
Cu alloys were selected in consideration of their electrical conductivity, but on the other hand, Ag or Ag-Cu alloys have low hardness, so when used as commutator pieces, they suffer from a large amount of wear. As a result, there was a drawback in that it lacked reliability in terms of service life when moved over a long period of time. The present invention has been made in view of this drawback, and has substantially retained the excellent electronic conductivity properties of conventionally used Ag or Ag-Cu alloys, and has high hardness, that is, excellent wear resistance. The present invention aims to provide a commutator material for Ag-Pd alloy brushes. In the present invention, an Ag alloy consisting of a total amount of at least one of Sn, Cd, and Mn of 0.05 to 1% by weight, Fe of 0.05 to 0.5% by weight, and the balance Ag is internally oxidized.
- Commutator material for Pd alloy brushes. When Sn, Cd and Mn are subjected to internal oxidation treatment, they become fine oxides and are dispersed in Ag.
It plays the role of increasing the softening temperature of the steel and further improving its mechanical strength. Its content is 0.05~1
The reason for limiting the weight percentage (hereinafter referred to as "w/o") is that if it is less than 0.05w/o, the proportion of dispersion in Ag will be small, and as a result, the mechanical strength cannot be improved much. This is because even if the content exceeds /o, no further improvement in mechanical strength can be expected; rather, the opposite effect of embrittlement of the material will occur. Next, Fe is used to suppress coarsening of Ag crystal grains during internal oxidation treatment and prevent the material from becoming brittle. The content was limited to 0.05 to 0.5 w/o because if it is less than 0.05 w/o, it is less effective in preventing material embrittlement, and if it exceeds 0.5 w/o, it is difficult to disperse it uniformly in Ag. This is because it becomes a cause of defects such as segregation. Next, in order to clarify the effects of the present invention, specific embodiments and conventional examples thereof will be described. Example 1 Ag was melted in a high frequency melting furnace and Sn was added to it.
After adding 0.4 w/o and 0.15 w/o of Fe to form an Ag alloy, it was cast to obtain an ingot. This ingot was wire drawn to obtain a material with desired dimensions. Thereafter, internal oxidation treatment was performed by heating at 700° C. for 10 hours in an oxygen atmosphere. This material was further rolled to form a tape material of a predetermined thickness. Commutators were manufactured in the same manner using the materials shown in the left column of the attached table. The electrical conductivity and hardness of the materials shown in Examples 1 to 10, comparative examples, and Ag and Ag-Cu alloys (Ag-7.5w/oCu) conventionally used as commutators, as well as as commutator pieces. At 2100 rpm
The amount of wear (wear depth) when sliding with Ag-50w/oPd for 500 hours was measured. The measurement results are shown in the table.
【表】
表から判明する通り、本発明より成る材料は、
従来用いられていたAg或いはAg−7.5w／oCuと
比較して、電気伝導度に於いてはAgと比較した
場合多少劣るがAg−7.5w／oCuと比較した場合
略同等であり、しかも硬度に於いては従来のAg
或いはAg−7.5w／oCuと比較した場合数段優れ
ておりその結果摩耗量も10分の１程度と低く、稼
動寿命を延長させ高い信頼性の得られるものであ
る。
尚、本発明より成る材料は、無垢ままAg−Pd
合金刷子用整流子材料として用いてもその用を充
分果たすものであり、又他の材料と張り合わせた
所謂クラツド材として用いる事も出来るものであ
る。更に本発明より成る材料の使用時には硫化を
防ぐためその表面に耐硫化性の薄い層（例えば、
Au、Au−Ag合金）を設けてもよいものである。[Table] As is clear from the table, the material of the present invention is
Compared to conventionally used Ag or Ag-7.5w/oCu, the electrical conductivity is slightly inferior to Ag, but it is almost the same when compared to Ag-7.5w/oCu, and the hardness is Conventional Ag
Or, when compared with Ag-7.5w/oCu, it is several orders of magnitude better, and as a result, the amount of wear is as low as about one-tenth, extending the operating life and providing high reliability. In addition, the material made of the present invention is Ag-Pd as it is.
It can also be used as a commutator material for alloy brushes, and can also be used as a so-called clad material laminated with other materials. Furthermore, when using the material of the present invention, a thin sulfidation-resistant layer (e.g.
Au, Au-Ag alloy) may be provided.
Claims (1)
で0.05〜１重量％、Feを0.05〜0.5重量％及び残部
AgからなるAg合金が内部酸化されたAg−Pd合
金刷子用整流子材料。1 At least one of Sn, Cd, and Mn in a total amount of 0.05 to 1% by weight, Fe 0.05 to 0.5% by weight, and the balance
A commutator material for Ag-Pd alloy brushes in which an Ag alloy consisting of Ag is internally oxidized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3353080A JPS56130094A (en) | 1980-03-17 | 1980-03-17 | Rectifier or brush material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3353080A JPS56130094A (en) | 1980-03-17 | 1980-03-17 | Rectifier or brush material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56130094A JPS56130094A (en) | 1981-10-12 |
| JPH0135905B2 true JPH0135905B2 (en) | 1989-07-27 |
Family
ID=12389093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3353080A Granted JPS56130094A (en) | 1980-03-17 | 1980-03-17 | Rectifier or brush material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56130094A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999001584A1 (en) * | 1997-07-02 | 1999-01-14 | Mabuchi Motor Co., Ltd. | Sliding contact material, clad composite material, and small d.c. motor made by using the same |
| JP4111906B2 (en) | 2003-11-26 | 2008-07-02 | マブチモーター株式会社 | Sliding contact material, clad composite material and DC small motor using the same |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4836697A (en) * | 1971-09-09 | 1973-05-30 | ||
| JPS4883392A (en) * | 1972-02-15 | 1973-11-07 | ||
| JPS51120927A (en) * | 1975-04-16 | 1976-10-22 | Sumitomo Electric Ind Ltd | Electric contact material |
| JPS524092A (en) * | 1975-06-30 | 1977-01-12 | Matsushita Electric Works Ltd | Electrical contact point material |
| JPS52146719A (en) * | 1976-05-31 | 1977-12-06 | Mitsubishi Marorii Yakin Kougi | Method of making contact materials of oxide dispersion type silver alloy wires |
| JPS5390132A (en) * | 1977-01-21 | 1978-08-08 | Tanaka Precious Metal Ind | Preparation of aggoxide complex contact material |
| JPS542918A (en) * | 1977-06-10 | 1979-01-10 | Maruzen Kogyo Co Ltd | Silver silicon alloy for electric contact |
-
1980
- 1980-03-17 JP JP3353080A patent/JPS56130094A/en active Granted
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4836697A (en) * | 1971-09-09 | 1973-05-30 | ||
| JPS4883392A (en) * | 1972-02-15 | 1973-11-07 | ||
| JPS51120927A (en) * | 1975-04-16 | 1976-10-22 | Sumitomo Electric Ind Ltd | Electric contact material |
| JPS524092A (en) * | 1975-06-30 | 1977-01-12 | Matsushita Electric Works Ltd | Electrical contact point material |
| JPS52146719A (en) * | 1976-05-31 | 1977-12-06 | Mitsubishi Marorii Yakin Kougi | Method of making contact materials of oxide dispersion type silver alloy wires |
| JPS5390132A (en) * | 1977-01-21 | 1978-08-08 | Tanaka Precious Metal Ind | Preparation of aggoxide complex contact material |
| JPS542918A (en) * | 1977-06-10 | 1979-01-10 | Maruzen Kogyo Co Ltd | Silver silicon alloy for electric contact |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56130094A (en) | 1981-10-12 |
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